Portion of a shoe sole



FIG. 1 is a bottom, right perspective view of a portion of a shoe sole showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

The subject matter shown in broken line represents unclaimed environmental structure which is shown for illustrative purposes and forms no part of the claimed design. 

The ornamental design for a portion of a shoe sole, as shown and described. 